Table 4.

Descriptive analysis for the heterogeneity

Hospit al #	n	Census Region / Division	Case				Control
					Avg per Patient				Avg per Patient
			n	Visit	Diagnoses	Medication	n	Visit	Diagnoses	Medication
1	57,202	Northeast / 2	6,176	15	19	35	51,026	12	13	22
2	55,286	Northeast / 2	6,274	13	19	26	49,012	10	13	19
3	52,158	South / 7	6,545	8	12	30	45,613	6	10	24
4	44,277	Midwest / 4	6,257	12	19	25	38,020	10	15	20
5	42,729	South / 6	5,010	13	23	27	37,719	11	17	19
6	38,332	Northeast / 2	5,394	5	17	30	32,938	4	14	23
7	30,172	South / 5	3,352	6	27	30	26,820	5	19	21
8	28,440	Northeast / 2	3,075	8	13	35	25,365	6	9	22
9	24,913	South / 5	3,659	5	19	28	21,254	5	14	20
10	18,903	Northeast / 1	2,352	8	13	24	16,551	7	10	17